package com.universal.frame.generalutils;

import java.io.File;
import java.math.BigDecimal;

import android.content.Context;
import android.os.Environment;

public class CacheCleanManager {
	 public static String getTotalCacheSize(Context context) throws Exception {
         long cacheSize = getFolderSize(context.getCacheDir());
         if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {  
             cacheSize += getFolderSize(context.getExternalCacheDir());
         }  
         return getFormatSize(cacheSize);
     }


 public static void clearAllCache(Context context) {
     deleteDir(context.getCacheDir());
     if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {  
         deleteDir(context.getExternalCacheDir());
     }  
 }

 private static boolean deleteDir(File dir) {
     if (dir != null && dir.isDirectory()) {
         String[] children = dir.list();
         for (int i = 0; i < children.length; i++) {
             boolean success = deleteDir(new File(dir, children[i]));
             if (!success) {
                 return false;
             }
         }
     }
     return dir.delete();
 }
    
 // 获取文件  
 //Context.getExternalFilesDir() --> SDCard/Android/data/你的应用的包名/files/ 目录，一般放一些长时间保存的数据  
 //Context.getExternalCacheDir() --> SDCard/Android/data/你的应用包名/cache/目录，一般存放临时缓存数据  
 public static long getFolderSize(File file) throws Exception {  
     long size = 0;  
     try {  
         File[] fileList = file.listFiles();  
         for (int i = 0; i < fileList.length; i++) {  
             // 如果下面还有文件  
             if (fileList[i].isDirectory()) {  
                 size = size + getFolderSize(fileList[i]);  
             } else {  
                 size = size + fileList[i].length();  
             }  
         }  
     } catch (Exception e) {  
         e.printStackTrace();  
     }  
     return size;  
 }  
    
 /** 
  * 格式化单位 
  *  
  * @param size 
  * @return 
  */ 
 public static String getFormatSize(double size) {  
     double kiloByte = size / 1024;  
     if (kiloByte < 1) {  
//         return size + "Byte";  
         return "0K";
     }  

     double megaByte = kiloByte / 1024;  
     if (megaByte < 1) {  
         BigDecimal result1 = new BigDecimal(Double.toString(kiloByte));  
         return result1.setScale(2, BigDecimal.ROUND_HALF_UP)  
                 .toPlainString() + "KB";  
     }  

     double gigaByte = megaByte / 1024;  
     if (gigaByte < 1) {  
         BigDecimal result2 = new BigDecimal(Double.toString(megaByte));  
         return result2.setScale(2, BigDecimal.ROUND_HALF_UP)  
                 .toPlainString() + "MB";  
     }  

     double teraBytes = gigaByte / 1024;  
     if (teraBytes < 1) {  
         BigDecimal result3 = new BigDecimal(Double.toString(gigaByte));  
         return result3.setScale(2, BigDecimal.ROUND_HALF_UP)  
                 .toPlainString() + "GB";  
     }  
     BigDecimal result4 = new BigDecimal(teraBytes);  
     return result4.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString()  
             + "TB";  
 }  
    
}
